A computer system is a collection of hardware and software that performs specific tasks. It is a programmable electronic device that can accept input, store data, retrieve, process, and output information. A computer system is a nominally complete computer that includes the hardware, operating system (main software), and peripheral equipment needed and used for full operation. The term “system” refers to the interconnection of individual components, which work together to perform an overall task or set of tasks.

Components of a computer system include:

• Hardware: Physical, tangible computer equipment and devices that provide support for major functions such as input, processing, output, storage, and communication. Examples include the central processing unit (CPU), memory, storage devices, input/output (I/O) interfaces, network connections, and other components.

• Software: Programs that run on the CPU to perform various functions for users. It consists of system software and application software. System software includes the operating system (OS), utilities software, programming language translators, and library routines. Application software includes programs that let a user perform particular tasks, such as word processing, database management, spreadsheet calculations, web browsing, gaming, programming, and graphic design.

• Liveware: The computer user, also known as orgware or the humanware. The user commands the computer system to execute instructions.

Computer systems can be as simple as a single device or as complex as an entire network of devices working together. They are used in a broad range of industrial and consumer products as control systems, including simple special-purpose devices like microwave ovens and remote controls, factory devices like industrial robots and computer-aided design, as well as general-purpose devices like personal computers and mobile devices like smartphones.